Philip McConnell wrote:
> Norm,
>
> Do you try to group breakers and fuses? Like maybe having a small panel 
> in each cabin? If not, what system do you use for locating them so they 
> can easily be found in a pinch?
>
> Thanks,
>
> Philip McConnell
REPLY
That is the approach I took on my latest design.  Each sub panel 
location has three panels.  230V, 120V and DC.
We only needed  6 or 8 breakers per location except for  one central 
panel  because all the galley  devices  hotel services  pumps etc, wer 
within  six cabel feet of the panel but on opposite sides of bulkheads 
and above or below the main deck.

The main power busses were run  fore and aft inside two 3" PVC 
conduits.  AC in one and DC in the other. These are protected by 400A 
Class T fuses.
A 400 amp fuse protects the main bus cables and  indiviidual breakers 
protect  each branch circuit. Since starter circuits  are fed from 
independent battery  start current is not an issue.

The helm area has its own DC panel for navigation gear.  A DC- DC 
converter handles the step down from 24V to 12V .for those few  devices  
that cannot use 24V.

For the few circuits where remote control is desirable  I use latching 
relays. These do not use power except when  actually toggling from on to 
of or vice versa.
An added advantage of latching relays is the ease with which you can  
have multi point control of the same circuit.  For example, you can turn 
on all deck lights from pilot house, exit to cockpit or even by a 
wireless remote for when you return after dark by dinghy.
Arild


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